Hi Collin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on kvms390/next] [also build test WARNING on s390/features v5.7-rc5] [cannot apply to kvm/linux-next next-20200512] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Collin-Walling/Use-DIAG318-to-se... base: https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git next config: s390-allyesconfig (attached as .config) compiler: s390-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from arch/s390/include/asm/kvm_host.h:22, from include/linux/kvm_host.h:36, from arch/s390/kvm/kvm-s390.c:23: arch/s390/kvm/kvm-s390.c: In function 'kvm_s390_set_diag318_info': 1253 | VM_EVENT(kvm, 3, "SET: CPNC: 0x%x CPVC: 0x%llx", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1254 | kvm->arch.diag318_info.cpnc, kvm->arch.diag318_info.cpvc); | ~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | long unsigned int:56 arch/s390/include/asm/debug.h:247:12: note: in definition of macro 'debug_sprintf_event' 247 | _fmt, ## __VA_ARGS__); | ^~~~ 1253 | VM_EVENT(kvm, 3, "SET: CPNC: 0x%x CPVC: 0x%llx", | ^~~~~~~~ arch/s390/kvm/kvm-s390.c:1253:47: note: format string is defined here 1253 | VM_EVENT(kvm, 3, "SET: CPNC: 0x%x CPVC: 0x%llx", | ~~~^ | | | long long unsigned int vim +1253 arch/s390/kvm/kvm-s390.c 1245 1246 void kvm_s390_set_diag318_info(struct kvm *kvm, u64 info) 1247 { 1248 struct kvm_vcpu *vcpu; 1249 int i; 1250 1251 kvm->arch.diag318_info.val = info; 1252 1254 kvm->arch.diag318_info.cpnc, kvm->arch.diag318_info.cpvc); 1255 1256 if (sclp.has_diag318) { 1257 kvm_for_each_vcpu(i, vcpu, kvm) { 1258 vcpu->arch.sie_block->cpnc = kvm->arch.diag318_info.cpnc; 1259 } 1260 } 1261 } 1262 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org